EP2687367B1 - Bituminöse Unterlagenstruktur für nicht durchgehende Abdeckungen - Google Patents

Bituminöse Unterlagenstruktur für nicht durchgehende Abdeckungen Download PDF

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Publication number
EP2687367B1
EP2687367B1 EP13176076.1A EP13176076A EP2687367B1 EP 2687367 B1 EP2687367 B1 EP 2687367B1 EP 13176076 A EP13176076 A EP 13176076A EP 2687367 B1 EP2687367 B1 EP 2687367B1
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Prior art keywords
bituminous
natural
virgin
recycled
polymers
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English (en)
French (fr)
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EP2687367A1 (de
Inventor
Ugo Faotto
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Silcart SpA
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Silcart SpA
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N5/00—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch
    • D06N5/003—Roofing materials comprising a fibrous web coated with bitumen or another polymer, e.g. pitch coated with bitumen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B11/00—Layered products comprising a layer of bituminous or tarry substances
    • B32B11/04—Layered products comprising a layer of bituminous or tarry substances comprising such bituminous or tarry substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B11/00—Layered products comprising a layer of bituminous or tarry substances
    • B32B11/04—Layered products comprising a layer of bituminous or tarry substances comprising such bituminous or tarry substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B11/046—Layered products comprising a layer of bituminous or tarry substances comprising such bituminous or tarry substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B11/00—Layered products comprising a layer of bituminous or tarry substances
    • B32B11/10—Layered products comprising a layer of bituminous or tarry substances next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D12/00—Non-structural supports for roofing materials, e.g. battens, boards
    • E04D12/002—Sheets of flexible material, e.g. roofing tile underlay
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/042—Bituminous or tarry substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2274/00—Thermoplastic elastomer material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/71—Resistive to light or to UV
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B32B2419/06—Roofs, roof membranes

Definitions

  • the present application relates to a bituminous underlay structure for non-continuous coverings.
  • bituminous underlay for non-continuous coverings
  • the characteristic of membranes with a low basis weight, in particular 30-90 g/m 2 is the presence of non-uniformities and irregularities with a high incidence of thinning, i.e. regions with a lower basis weight and thickness, which is due to the technology for producing non-woven fabric.
  • the main aim of the present invention is therefore to resolve the above-mentioned technical problems, eliminating the drawbacks in the cited known art and hence providing an invention that makes it possible to obtain a bituminous underlay which has a uniform surface despite using a membrane that is intrinsically light and non-uniform.
  • an object of the present invention is to provide a bituminous underlay that gives uniformity, elasticity and protection to the membrane and is waterproof.
  • Another object of the invention is to provide a bituminous underlay in which the membrane can be protected against damage by external agents, such as for example the stresses caused by the trampling of installation technicians during laying, in particular in roofs with a steep pitch in which the friction between the sheet and the special footwear used by installation technicians for walking on roofs can generate abrasions and surface cuts.
  • Another object of the invention is to provide a bituminous underlay that offers stability at and resistance to high temperatures, and high resistance to atmospheric ageing and to UV rays.
  • Another object of the invention is to provide an invention that is low-cost.
  • bituminous underlay structure for non-continuous coverings, characterized in that it has an overall basis weight of 500-1500 g/m 2 and is constituted by a membrane with a basis weight of 30-100 g/m 2 , made of polyester or fiberglass or polypropylene or synthetic, natural or composite fabrics or non-woven fabrics, embedded between two first layers which are obtained by saturation/covering with elastomeric bituminous mixture with a high content of SBS or other elastomers or polymers of synthetic or natural origin, virgin or recycled, the whole in turn embedded between at least two second layers which are obtained by spreading/covering with elastoplastomeric bituminous mixture with polymers of synthetic or natural origin, virgin or recycled, the whole in turn covered by two third layers of finishing with non-woven fabric or talc, sand or polyethylene film.
  • the reference numeral 1 generally designates a bituminous underlay structure for non-continuous coverings which is constituted by a membrane 2, made of polyester or fiberglass or polypropylene or synthetic, natural or composite fabrics or non-woven fabrics.
  • Such structure has an overall basis weight of 500-1500 g/m 2 .
  • Such membrane has a basis weight of 50-100 g/m 2 .
  • the membrane is embedded between two first layers (3a, 3b) which are obtained by saturation/covering (where the covering can be obtained with different techniques such as spreading, extrusion, immersion, spraying) with elastomeric bituminous mixture with a high content of SBS (styrene butadiene styrene) or other elastomers or polymers of synthetic or natural origin, virgin or recycled.
  • SBS styrene butadiene styrene
  • Such first layers level the surface of the membrane and make it homogeneous.
  • the first high-performance elastomeric bituminous layers (3a, 3b) are constituted by a bituminous elastomeric and/or adhesive compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such first high-performance elastomeric bituminous layers (3a, 3b) are constituted by a bituminous elastomeric and/or adhesive compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such first high-performance elastomeric bituminous layers (3a, 3b) are constituted by a bituminous elastomeric and/or adhesive compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such first high-performance elastomeric bituminous layers (3a, 3b) are constituted by a bituminous elastomeric and/or adhesive compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such first high-performance elastomeric bituminous layers (3a, 3b) are constituted by a bituminous elastomeric and/or adhesive compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such first high-performance elastomeric bituminous layers (3a, 3b) have a ball & ring index (index of resistance to high temperatures of the bituminous mixture - ASTM D36-95 standard) of 80-130 °C and a penetration (index of plasticity and ductility of the bituminous compound - ASTM D5-05A standard) of 20-90 dmm.
  • the whole is in turn embedded between at least two second layers (4a, 4b) which are obtained by spreading/covering with elastoplastomeric bituminous mixture with polymers of synthetic or natural origin, virgin or recycled.
  • Such second layers are constituted by an elastoplastomeric bituminous compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such second layers are constituted by an elastoplastomeric bituminous compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such second layers are constituted by an elastoplastomeric bituminous compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such second layers are constituted by an elastoplastomeric bituminous compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such second layers are constituted by an elastoplastomeric bituminous compound, made with polymers of natural or synthetic origin, virgin or recycled, with the following composition:
  • Such second high-performance elastoplastomeric bituminous layers (4a, 4b) have a ball & ring index (index of resistance to high temperatures of the bituminous mixture - ASTM D36-95 standard) of 95-130 °C and a penetration (index of plasticity and ductility of the bituminous compound - ASTM D5-05A standard) of 20-55 dmm.
  • This bituminous mass is high stability at and resistance to high temperatures, and high resistance to atmospheric ageing and to UV rays and to external stresses caused by the trampling of installation technicians.
  • the whole is in turn covered by two third layers (5a, 5b) of finishing with non-woven fabric or talc, sand or polyethylene film.
  • the invention fully achieves the intended aim and objects, in that a bituminous underlay structure for non-continuous coverings is obtained which has a uniform surface, despite using a membrane made of non-woven fabric that is intrinsically light and non-uniform, is elastic, protects the membrane and is waterproof, with the result that the membrane can be protected against damage from external agents.
  • the first confers uniformity, elasticity and protection on the membrane (non-woven fabric), while the second gives waterproofing and structure to the end product.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Textile Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Claims (10)

  1. Eine bituminöse Unterlagenstruktur (1) für nicht durchgehende Abdeckungen, dadurch gekennzeichnet, dass sie eine Gesamt-Flächenmasse von 500-1500 g/m2 hat und aus einer Membran (2) mit einer Flächenmasse von 30-100 g/m2 besteht, hergestellt aus Polyester oder Glasfaser oder Polypropylen oder synthetischem, natürlichem oder Verbundgewebe odervliesstoff, eingebettet zwischen zwei ersten Schichten (3a, 3b), die gewonnen werden durch Imprägnierung/Abdeckung mit bituminöser Elastomermischung mit einem hohen Gehalt an SBS oder anderen Elastomeren oder Polymeren synthetischen oder natürlichen Ursprungs, unbehandelt oder recycelt, wobei das Ganze wiederum zwischen mindestens zwei zweiten Schichten (4a, 4b) eingebettet ist, die gewonnen werden durch Bestreichen/Abdecken mit bituminöser Elastoplastomermischung mit Polymeren synthetischen oder natürlichen Ursprungs, unbehandelt oder recycelt, wobei das Ganze wiederum mit zwei dritten Schichten (5a, 5b) zur Oberflächenbehandlung mit Vliesstoff oder Talk, Sand oder Polyethylenfolie bedeckt ist.
  2. Die Struktur gemäß Anspruch 1, dadurch gekennzeichnet, dass die erste bituminöse Hochleistungs-Elastomerschicht (3a, 3b) aus einer bituminösen elastomeren und/oder klebenden Verbindung, hergestellt mit Polymeren natürlichen oder synthetischen Ursprungs, unbehandelt oder recycelt, mit folgender Zusammensetzung besteht:
    destilliertes Bitumen (Durchdringung 100-400 dmm - ASTM D5-05A-Standard): 40-80%
    naphthenisches oder paraffinisches Öl: 1-6%
    SBS: 10-30%
    PE oder LDPE und/oder HDPE: 2-5%
    klebrig machende Harze (aromatisch, kolophonisch, fest und/oder flüssig): 2-10%
    CaCO3: 5-15%.
  3. Die Struktur gemäß Anspruch 1, dadurch gekennzeichnet, dass die erste bituminöse Hochleistungs-Elastomerschicht (3a, 3b) aus einer bituminösen elastomeren und/oder klebenden Verbindung, hergestellt mit Polymeren natürlichen oder synthetischen Ursprungs, unbehandelt oder recycelt, mit folgender Zusammensetzung besteht: destilliertes Bitumen: 68% Öl: 5% SBS: 15% LDPE: 1% HDPE: 1% Harze: 5% CaCO3: 5%
  4. Die Struktur gemäß Anspruch 1, dadurch gekennzeichnet, dass die erste bituminöse Hochleistungs-Elastomerschicht (3a, 3b) aus einer bituminösen elastomeren und/oder klebenden Verbindung, hergestellt mit Polymeren natürlichen oder synthetischen Ursprungs, unbehandelt oder recycelt, mit folgender Zusammensetzung besteht: destilliertes Bitumen: 67% Öl: 3% SBS: 10% LDPE: 4% HDPE: 1% Harze: 5% CaCO3: 10%
  5. Die Struktur gemäß Anspruch 1, dadurch gekennzeichnet, dass die erste bituminöse Hochleistungs-Elastomerschicht (3a, 3b) aus einer bituminösen elastomeren und/oder klebenden Verbindung, hergestellt mit Polymeren natürlichen oder synthetischen Ursprungs, unbehandelt oder recycelt, mit folgender Zusammensetzung besteht: destilliertes Bitumen: 56% Öl: 5% SBS: 15% LDPE: 3% HDPE: 1% Harze: 5% CaCO3: 15%
  6. Die Struktur gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass die erste bituminöse Elastomerschicht (3a, 3b) einen Kugelringindex (ASTM D36-95-Standard) von 80-130°C und eine Durchdringung von 20-90 dmm (ASTM D5-05A-Standard) hat.
  7. Die Struktur gemäß einem oder mehreren der obigen Ansprüche, dadurch gekennzeichnet, dass mindestens eine der mindestens zwei zweiten Schichten (4a, 4b) aus einer bituminösen Elastoplastomerverbindung besteht, hergestellt mit Polymeren natürlichen oder synthetischen Ursprungs, unbehandelt oder recycelt, mit folgender Zusammensetzung:
    destilliertes Bitumen (Durchdringung 60-300 dmm - ASTM D5-05A-Standard): 40-80%
    SBS: 2-10%
    PE oder LDPE und/oder HDPE: 1-5%
    IPP: 2-4%
    APP: 3-10%
    CaCO3: 20-70%
  8. Die Struktur gemäß Anspruch 7, dadurch gekennzeichnet, dass mindestens eine der mindestens zwei zweiten Schichten (4a, 4b) aus einer bituminösen Elastoplastomerverbindung besteht, hergestellt mit Polymeren natürlichen oder synthetischen Ursprungs, unbehandelt oder recycelt, mit folgender Zusammensetzung:
    destilliertes Bitumen: 58%
    SBS: 3,5%
    LDPE: 1%
    IPP: 2%
    APP: 2,5%
    CaCO3: 33%
  9. Die Struktur gemäß einem beliebigen der Ansprüche 1-6, dadurch gekennzeichnet, dass mindestens eine der mindestens zwei zweiten Schichten (4a, 4b) aus einer bituminösen Elastoplastomerverbindung besteht, hergestellt mit Polymeren natürlichen oder synthetischen Ursprungs, unbehandelt oder recycelt, mit folgender Zusammensetzung:
    destilliertes Bitumen: 66,5%
    SBS: 3,5%
    LDPE: 1%
    APP: 0,5%
    IPP: 3,5%
    CaCO3: 25%
  10. Die Struktur gemäß einem beliebigen der Ansprüche 1-6, dadurch gekennzeichnet, dass mindestens eine der mindestens zwei zweiten Schichten (4a, 4b) aus einer bituminösen Elastoplastomerverbindung besteht, hergestellt mit Polymeren natürlichen oder synthetischen Ursprungs, unbehandelt oder recycelt, mit folgender Zusammensetzung:
    destilliertes Bitumen: 60,5%
    SBS: 4%
    HDPE: 0,5%
    APP: 3,5%
    IPP: 1,5%
    CaCO3: 30%
EP13176076.1A 2012-07-17 2013-07-11 Bituminöse Unterlagenstruktur für nicht durchgehende Abdeckungen Active EP2687367B1 (de)

Applications Claiming Priority (1)

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IT000025U ITTV20120025U1 (it) 2012-07-17 2012-07-17 Struttura di sottotegola bituminoso per coperture discontinue

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EP2687367A1 EP2687367A1 (de) 2014-01-22
EP2687367B1 true EP2687367B1 (de) 2019-04-24

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CN108997936A (zh) * 2018-07-31 2018-12-14 河南华瑞兴业防水科技有限公司 铁路混凝土桥面用高聚物改性沥青防水卷材及制备方法

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